While the Cambridge Dictionary defines disease and illness as “(an) illness of people, animals, plants, etc., caused by infection or a failure of health rather than by an accident,” CWRGM employs this subject tag to refer to human diseases and illnesses only. Furthermore, we apply it to both specific references to diseases and illnesses, such as the measles, and general descriptions of diseases and illnesses, such as sickness or ill health.
The graph displays the other subjects mentioned on the same pages as the subject "Disease and Illness". If the same subject occurs on a page with "Disease and Illness" more than once, it appears closer to "Disease and Illness" on the graph, and is colored in a darker shade. The closer a subject is to the center, the more "related" the subjects are.